Four people were killed Killing : an Iraqi-born British tourist named Name_conferral Saad al-Hilli , 50 ; his wife Iqbal , 47 ; her mother Suhaila al-Allaf , 74 , who held Defending a Swedish passport ; and French cyclist Sylvain Mollier , 45 .

Police investigated Criminal_investigation al-Hilli 's past in Iraq as an engineer on sensitive topics , as well as his work at the time of his death Death , as a potential motive for the attack Attack .